主键自增长
关于mysql的selectKey 标签设置 通过调用SELECT LAST_INSERT_ID()
mysql表的主键必须为自动增长的AUTO_INCREMENT
<selectKey resultType="java.lang.Long" keyProperty="id" order="AFTER" >
SELECT LAST_INSERT_ID()
</selectKey>
具体的例子为
<insert id="insert" parameterType="com.liangbo.xing.flexibletranscation.domain.ftm.TranscationMsgSubDo" >
<selectKey resultType="java.lang.Long" keyProperty="id" order="AFTER" >
SELECT LAST_INSERT_ID()
</selectKey>
insert into t_transcation_msg_sub (messageId, status, topicId,
subId, maxRetry, retryInterval,
retry, nextRetryTime, version,
createTime, updateTime)
values (#{messageid,jdbcType=VARCHAR}, #{status,jdbcType=INTEGER}, #{topicid,jdbcType=VARCHAR},
#{subid,jdbcType=VARCHAR}, #{maxretry,jdbcType=INTEGER}, #{retryinterval,jdbcType=INTEGER},
#{retry,jdbcType=INTEGER}, #{nextretrytime,jdbcType=TIMESTAMP}, #{version,jdbcType=VARCHAR},
#{createtime,jdbcType=TIMESTAMP}, #{updatetime,jdbcType=TIMESTAMP})
</insert>
执行完了 transcationMsgSubDao.insert(TranscationMsgSubDo transcationMsgSubDo);后再执行
transcationMsgSubDo.getId(); 的方法时会发现ID属性是有值的 其实是通过selectKey回写的
主键为UUID
mysql表的主键为varchar类型
mysql的selectKey 标签设置 select replace(uuid(),'-','') from dual
<insert id="save" parameterType="com.qbsea.modules.zexample1.model.Zexample1Model">
<selectKey keyProperty="id" resultType="String" order="BEFORE">
select replace(uuid(),'-','') from dual
</selectKey>
INSERT INTO TB_ZEXAMPLE1(ID,NAME,AGE,AMOUNT,ADD_TIME,STATUS)
VALUES(#{id},#{name},#{age},#{amount},#{addTime},#{status})
</insert>